[Mike O]

How can it possibly move on anything but the TSP? Isn't the TSP the angle from the tip of the rear shoulder at the end of the backstroke, no matter where it stops, to the baseline of the plane?

Tong, it's a nice quote, but doesn't really clear up (for me, it's all about me remember ) whether or not the rear shoulder should remain on its downstroke plane angle from the End, to the end of the Follow Through, never leaving it. Is there an official, written in concrete, answer on that?

There was a pic posted by Mathew in the Delivery Path and Flying Wedges thread showing Yoda "achieving a perfect Turned Shoulder Plane with Zero Shift". Yoda's shoulder was above the TSP at impact, and I asked if that was indeed perfect execution, because if it was I could update my understanding. Nobody answered, and I didn't push it. Maybe I should have

I think it's obvious that the right shoulder is ideally just on-plane during the start-down. If it's thrusting - then ideally during that thrust period it would be on plane- but not necessary as you could have an offsetting thrust to balance it out if it was thrusting offplane- see 2-N-1 for that discussion. Of course, there are certain limited conditions/strokes where the right shoulder could be on-plane throughout the downstroke - but we're talking about the norm i.e. you'll have a tough time finding a professional who has their right shoulder on plane at impact- if not impossible. For those that think the right shoulder should/could be on plane throughout the downstroke then you'll need to clearly prove your point.